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  • During the detection of hydrogen in an organic compound, blue colour appears due to the presence of Option: 1 <img alt="\mathrm{CaCO _{3}}" src=

During the detection of hydrogen in an organic compound, blue colour appears due to the presence of 

Option: 1

\mathrm{CaCO _{3}}


Option: 2

\mathrm{Ca ( OH )_{2}}


Option: 3

\mathrm{Cu{(NO _{3})}_2}


Option: 4

\mathrm{CuSO _{4} \cdot 5 H _{2} O}


Answers (1)

best_answer

As we have learnt,

Hydrogen present in the compound is converted to water vapour which is tested by anhydrous Copper Sulphate. Anhydrous \mathrm{CuSO_4} is colourless which turns blue due to the formation of a complex with water molecules.

\mathrm{CuSO_4 (anhyd.) + 5 H_2O \longrightarrow CuSO_4.5H_2O}

Hence, the correct answer is Option (4)

Posted by

Divya Prakash Singh

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